965

965 is a natural number that comes after 964 and before 966. It is odd and composite. Its prime factorization is 5 × 193, making it a semiprime. The positive divisors are 1, 5, 193, and 965; the sum of divisors is 1164, and the sum of proper divisors is 199.

In various numeral systems, 965 is represented as decimal 965, binary 1111000101, octal 1705, and hexadecimal 0x3C5. In Roman numerals it is written as CMLXV.

As a calendar year, 965 CE falls in the 10th century. It is used in historical dating and inscriptions that reference events of the medieval period.

Other properties: the digits sum to 20, giving a digital root of 2; the number is congruent to 0 mod 5 and 2 mod 3.